The demand for composite materials containing thermoplastics and lignocellulosics, including wood plastic composites (WPC), is steadily growing. These composites are used for non-structural components like decking, fencing, siding, railing, window and door profiles [1]. Wood plastic composites display a variety of interesting characteristics, such as high modulus of elasticity (MOE) and durability, low water uptake and swelling, 3-D-formability and recyclability. A wide range of lignocellulosic materials such as wood particles (flour and fibers) or other natural fibers (hemp and flax) and thermoplastic polymers can be processed and designed into formulations and products for individual usage. The most used thermoplastic materials are polyvinyl chloride (PVC), polyethylene (PE) and isotactic polypropylene (iPP) [2].